This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A109893 #7 Aug 08 2015 22:29:07 %S A109893 10,8855,182637273,187913191983517,16299312030218924938187, %T A109893 173083581780047419995380839040497, %U A109893 300642522445723721070400405660702004585922575,109109034687569422667248530075550555291614316919209445960161,10269669381215922304236773275682334781908421087118493054965910074350106387039 %N A109893 a(n) = least integer of the form (n!-1)(n!-2)...(n!-k)/n!. %C A109893 k <= n. Subsidiary sequence: n such that k < n. %e A109893 a(3) = 5*4*3/6 =10. a(4) = 23*22*21*20/4! = 8855. %p A109893 A109893 := proc(n) local k ; for k from 1 to n do if mul( n!-i,i=1..k) mod ( n! ) = 0 then RETURN( mul(n!-i,i=1..k)/n!) ; fi ; od: end: seq(A109893(n),n=3..12) ; # _R. J. Mathar_, Feb 13 2008 %Y A109893 Cf. A109892. %K A109893 nonn %O A109893 3,1 %A A109893 _Amarnath Murthy_, Jul 13 2005 %E A109893 Corrected and extended by _R. J. Mathar_, Feb 13 2008